(incomplete) support for the stockfish engine.

diff --git a/Makefile.am b/Makefile.am
index 4cbd17161c08bce2a04f7c94e2f08c4166e1b032..4ba55fac9105af1d31b87df23c3e50cfba4683ce 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -48,10 +48,12 @@ dist_lisp_LISP =       \
        chess-scid.el      \
        chess-sjeng.el     \
        chess-sound.el     \
+       chess-stockfish.el \
        chess-test.el      \
        chess-transport.el \
        chess-tutorial.el  \
        chess-ucb.el       \
+       chess-uci.el       \
        chess-var.el       \
        chess-eco.el
 

diff --git a/chess-stockfish.el b/chess-stockfish.el
new file mode 100644 (file)
index 0000000..f01c75b
--- /dev/null
+++ b/chess-stockfish.el
@@ -0,0 +1,69 @@
+;;; chess-stockfish.el --- Play against stockfish!
+
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+;; Author: Mario Lang <mlang@delysid.org>
+;; Keywords: games
+
+;; This file is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to
+;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Code:
+
+(require 'chess-uci)
+
+(defgroup chess-stockfish nil
+  "The publically available chess engine 'stockfish'."
+  :group 'chess-engine
+  :link '(url-link "http://www.stockfishchess.com"))
+
+(defcustom chess-stockfish-path (executable-find "stockfish")
+  "*The path to the stockfish executable."
+  :type 'file
+  :group 'chess-stockfish)
+
+(defvar chess-stockfish-regexp-alist
+  (list
+   (cons (concat "^bestmove\\s-+\\(" chess-algebraic-regexp "\\)")
+        (function
+         (lambda ()
+           (message "move")
+           (funcall chess-engine-response-handler 'move
+                    (chess-engine-convert-algebraic (match-string 1) t)))))
+   (cons "^id\\s-+name\\s-+\\(.+\\)$"
+        (function
+         (lambda ()
+           (setq-local chess-engine-opponent-name (match-string 1)))))))
+
+(defun chess-stockfish-handler (game event &rest args)
+  (unless chess-engine-handling-event
+    (cond
+     ((eq event 'initialize)
+      (let ((proc (chess-uci-handler game 'initialize "stockfish")))
+       (when (and proc (processp proc) (eq (process-status proc) 'run))
+         (process-send-string proc "uci\n")
+         (setq chess-engine-process proc)
+         t)))
+
+     (t
+      (if (and (eq event 'undo)
+              (= 1 (mod (car args) 2)))
+         (error "Cannot undo until after stockfish moves"))
+
+      (apply 'chess-uci-handler game event args)))))
+
+(provide 'chess-stockfish)
+
+;;; chess-stockfish.el ends here

diff --git a/chess-uci.el b/chess-uci.el
new file mode 100644 (file)
index 0000000..befdaaa
--- /dev/null
+++ b/chess-uci.el
@@ -0,0 +1,62 @@
+;;; chess-uci.el --- Universal chess interface protocol for emacs-chess
+
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+;; Author: Mario Lang <mlang@delysid.org>
+;; Keywords: games
+
+;; This file is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to
+;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Code:
+
+(require 'chess-common)
+
+(defvar chess-uci-move-regexp "[a-h][1-8][a-h][1-8][nbrq]?"
+  "A regular expression matching a UCI move.")
+
+(defun chess-uci-position (game)
+  (concat "position fen " (chess-pos-to-fen (chess-game-pos game 0) t)
+         " moves " (mapconcat (lambda (ply)
+                                (let ((source (chess-ply-source ply))
+                                      (target (chess-ply-target ply)))
+                                  (if (and source target)
+                                      (concat (chess-index-to-coord source)
+                                              (chess-index-to-coord target)
+                                              (if (chess-ply-keyword ply :promote)
+                                                  (string (downcase (chess-ply-keyword ply :promote)))
+                                                ""))
+                                    "")))
+                              (chess-game-plies game) " ")
+         "\n"))
+
+(defun chess-uci-handler (game event &rest args)
+  (unless chess-engine-handling-event
+    (cond
+     ((eq event 'move)
+      (when (= 1 (chess-game-index game))
+       (chess-game-set-tag game "White" chess-full-name)
+       (chess-game-set-tag game "Black" chess-engine-opponent-name))
+
+      (chess-engine-send nil (concat (chess-uci-position game) "go\n"))
+      (if (chess-game-over-p game)
+         (chess-game-set-data game 'active nil)))
+
+     (t
+      (apply 'chess-common-handler game event args)))))
+
+(provide 'chess-uci)
+
+;;; chess-uci.el ends here